CVE-2019-18887

Description

An issue was discovered in Symfony 2.8.0 through 2.8.50, 3.4.0 through 3.4.34, 4.2.0 through 4.2.11, and 4.3.0 through 4.3.7. The UriSigner was subject to timing attacks. This is related to symfony/http-kernel.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.81% Top 30%
Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory symfony.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://symfony.com/blog/symfony-4-3-8-released release notes
https://github.com/symfony/symfony/releases/tag/v4.3.8 release notes
https://symfony.com/blog/cve-2019-18887-use-constant-time-comparison-in-urisigner vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DZNXRVHDQBNZQUCNRVZICPPBFRAUWUJX/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VXEAOEANNIVYANTMOJ42NKSU6BGNBULZ/ vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UED22BOXTL2SSFMGYKA64ZFHGLLJG3EA/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-18887?
CVE-2019-18887 has been scored as a high severity vulnerability.
How to fix CVE-2019-18887?
To fix CVE-2019-18887, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-18887 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2019-18887 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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